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This is great! The sprites are beautiful, the animations are amazing, the sounds are very satisfying...and then I saw it was another cart by Benjamin Soulé and I said "ah, of course!"

my only small complaint is that I wish "down" was used to rotate the other direction, and that one of the other buttons was used for dropping, especially because it's easy to accidentally hit down when using a controller d-pad, but I guess I should just edit the source to customize the controls for myself 'cause pico-8 is awesome like that :)

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The two first sprites is a space I use to store a light gradient for each color.
For example if you take color 2 ( dark red ). sget(2,0) will give you the orginal color. sget(2,1) is red, sget(2,2) is orange... etc. In the end all the color become white.

I use the function light() in my code to modify colors according to this method.

In the glow case I apply light on the 12x12 round shape you can see on sprite map at 40,0.
I draw this shape behind the ball.